抽卡：添加获取抽卡数据函数

game-server/app/services/gachaService.ts

@@ -0,0 +1,30 @@
+import { GachaData } from "../domain/activityField/gachaField";;
+import { ActivityModelType, ActivityModel } from "../db/Activity";
+
+/**
+ * 获取活动页签里的限时卡池
+ * 
+ * @param aid 活动id
+ */
+export async function getLimitGacha(activityId: number) {
+    
+    let activityData: ActivityModelType = await ActivityModel.findActivity(activityId, true);
+    if(!activityData) return false;
+    
+    let gachaData = new GachaData(activityData);
+
+    let { heroes, gachaId } = gachaData;
+
+    return {
+        gachaId,
+        heroes,
+        pickHero: 0,
+        freeCount: 0,
+        refFreeTime: 0,
+        count: 0,
+        floor: [{
+            id: 3,
+            count: 0
+        }]
+    }
+}